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Claude 3 Opus vs Grok-3
Comprehensive side-by-side LLM comparison
Claude 3 Opus leads with 31.3% higher average benchmark score. Claude 3 Opus offers 264.0K more tokens in context window than Grok-3. Grok-3 is $72.00 cheaper per million tokens. Claude 3 Opus is available on 3 providers. Overall, Claude 3 Opus is the stronger choice for coding tasks.
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Anthropic
Claude 3 Opus is a multimodal language model developed by Anthropic. This model demonstrates exceptional performance with an average score of 81.6% across 11 benchmarks. It excels particularly in ARC-C (96.4%), HellaSwag (95.4%), GSM8k (95.0%). It supports a 400K token context window for handling large documents. The model is available through 3 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2024, it represents Anthropic's latest advancement in AI technology.
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xAI
Grok-3 is a multimodal language model developed by xAI. This model demonstrates exceptional performance with an average score of 85.7% across 5 benchmarks. It excels particularly in AIME 2025 (93.3%), AIME 2024 (93.3%), GPQA (84.6%). It supports a 136K token context window for handling large documents. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents xAI's latest advancement in AI technology.
11 months newer
Claude 3 Opus
Anthropic
2024-02-29
Grok-3
xAI
2025-02-17
Pricing Comparison
Cost per million tokens (USD)
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Claude 3 Opus
Input:$15.00
Output:$75.00
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Grok-3
Input:$3.00
Output:$15.00($72.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 15 common benchmarks
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Claude 3 Opus
Average Score:59.9%(+31.3%)
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Grok-3
Average Score:28.6%
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Knowledge Cutoff
Training data recency comparison
Grok-3
2024-11-17
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude 3 Opus
3 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 120 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
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Claude 3 Opus
Avg Score:59.9%(+31.3%)
Providers:3
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Grok-3
Avg Score:28.6%
Providers:1